Evolution
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| EVOLUTION | Changes in genetic composition of a population
Through successive generations
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| GENETIC DRIFT | The process by which gene frequencies in small populations are changed
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| MIGRATION | Organism movement
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| EMIGRATION | Refers to the movement of organisms out of a group
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| IMMIGRATION | The movement of organisms into a group
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| SPECIES | A group of organisms of similar structure;
Capable of mating AND producing offspring
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| ADAPTATION | Changes in structure or function
Allows for success of a species
To survive all living things NEED to be suited to its environment.
i.e., Squirrels have sharp, strong claws for gripping tree trunks
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| ADAPTIVE RADIATION | A species evolves into various subgroups adapting differently to the environment;
Evolutionary pattern by which a single ancestral species evolves into many species
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| NATURAL SELECTION | Organism with favorable trait reproduces at higher rate
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| TAXONOMY | Science of classifying organisms based on evolutionary relationships
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| CLASSIFACATION LEVELS | Every organism can be classified at 7 different levels - kingdom, phylum, class, order, family, genus & species.
Each level contains organisms with similar characteristics. Kingdom largest group & very broad.
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| JEAN BAPTISTE LAMARCK | Evolution Contributor;
Believed organism made changes to adapt to their environment;
Passed on these acquired traits to offspring
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| CHARLES DARWIN | Evolution Contributor;
Believed in theory of natural selection
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| EVOLUTION seeks to ANSWER: | (1) What causes a species to change?
(2) How does an organism realize it has to adapt?
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| SPECIATION | The creation of new species;
i.e., When subgroups are isolated for long periods they become so different they are a new species
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Created by:
pj johnson
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